After reading/viewing this week’s materials, please respond to one or more of the following questions.

1. Describe in your own words the differences between steganography, digital watermarking, and digital rights management.
2. Choose three of the basic cryptosystems and give an overview of each.
3. Describe the operation of a one-time pad (OTP) and give an example of a device that uses an OTP either from your own experience or from research.

Each answer must have three references.

2. ENCRYPTION, HASHING AND DIGITAL SIGNATURE METHODS

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Actions for Encryption, Hashing and Digital Signature Methods

Must post first.

After reading/viewing this week’s materials, please respond to one or more of the following questions.

1. What are the strengths and weaknesses of symmetric key cryptography? Give an example of where this type of cryptography is used. What are the strengths and weaknesses of asymmetric key cryptography? Give an example of where this type of cryptography is used.
2. What are the types of message integrity controls and what benefit is provided by them? Give a short description of the various secure email protocols that are referenced in the Shon Harris book and the Course Content.
3. What benefit do digital signatures provide and what are their characteristics? In your own words, what does non-repudiation mean?

3. KEY MANAGEMENT, CRYPTOSYSTEMS, AND CRYPTANALYSIS

Actions for Key Management, Cryptosystems, and Cryptanalysis

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After reading/viewing this week’s materials, please respond to one or more of the following questions.

1. Define cryptanalysis and describe some of the common cryptanalytic techniques used to attack plaintext, ciphertext, ciphers, and hashes.
2. What factors affect the strength of an algorithm or cryptosystem? What are some common weaknesses that affect them?
3. Describe the functions of key management and the key agreement schemes used.